Machine



(No Model.) J. SUTTON.

SCREENING AND SIZING MAGHINB.

I ted June 12,1883.

N. PETEns, Phatn-Liihogmpher. Wmrmgmn, n C.

seesaw NG-rAN-D .SlZ-lNGe MACH NE SPECIFICATION -orming .,p art o Letters-PatnhNo.279,286,. dated June 1-2, 1883,

Applicationzfiled January 12-, 1883.\- (No model.).:-

I in the countyof Suffolk and Stateof New Yorky have invented a new and useful Inn PI'OVBIHGHTJ'IH Screeningand Sizing Machines, i

of whichthe'iollowing is a specification.

My invention relates,principally, to that class of screeningmachines in whichseveral rotary.. screens" are arranged one above another, and in which'zeach. screen is of finer. mesh than the one above it 5 but the invention is also'appli-j cableto machines having but a single rotary... screen; 1.

Theinvention is. moreparticnlarly intended for screening and sizing coal, .ores, gravel, &e., at the'mines or pits; -butit may be used for other purposes andin other localities.

The invention consists in various novel co1n binations of parts, which are .hereinafter described, and referred to in the claims.

The accompanying drawings illustrate: a screening-machine embodying myi-nvention.

Figure 1 is a vertical section of the machine. a

Fig; 2'is'a planof the feeding-hopper, thestopper which: controls the feed. therefrom being removed. "Fig; 3 isa horizontal section in a plane immediately above one of they'rotaryscreens, and Figs. 4 and 5 are partial vertical sections of machines embodying modifications of my invention.

Similar letters of reference designate corresponding-parts in all the figures.

Referring, first, to Figsl, 2,.and 3, A desiginclined chutes or fioorsh h 71 which extend natesthe casing or frame of themachine, which maybe of iron or woodand of any suitable construction.

B is the receivinghopper, which may be rigidly secured to the casing A, or hingedthereto, or made entirely removable therefrom, if desired. It may have at its top a grating, G, for casting off largelumps of material which it is not desired to pass through the machine.

D is the delivery pipe or nozzle from the hopper. As here shown, the feed of material from the hopper is controlled by astopper, e, of conical shape, arranged abovethe pipe or nozzle D, in a hood or guard, A, and adapted to be raised and lowered bya cord or'chain, a, or other suitable means. This stopper may be released, so as to shut down on the pipe 1),

' the material.

and so stop thefeed of material entirely or it regulate the feed and allowthe material to pass with the desired rapidity.

K designates an upright shaft arrangedbelow the pipe or nozzle D, and adaptedto' be rotated by means of gear-wheels a from any The "gear-wheels suitable source of power.

may be protected by ahood or guard, 0, se-

:cured to theshaft or. frame. The shaft carries rotary screens, here shown as three in number,

f f f but'a greater or less numberof screens may be used. The screens are secured to the shaft by meansiof collars-m m m fixed tothe shaft and proyidedwith arms supporting the screens. The screens maybe composed of .wirecloth,.or of any suitable perforated, reticulated, or foraminated material.

Below the several screens are fixed funnels r g 9 which are supported permanently on beams or crosswbars b, forming a part of the. casing or frame A. p

In the funnels g g" are eross-bars or bridges k k, which form center bearings for the shaft K.

The screens may be flat, as shown, or concaveor convex, and each screen may be pro vided with aflange or rim, 11, which projects downward .into the funnel below and prevents the escape of dust or particles.

sta-

through and are permanently fixed in the easin A. As shown clearlyin Fig. 3, each chute or floor surrounds theadiacent funnel, andhas three branches, or extends through three sides ofthe casing, so as to afford a free delivery of As here shown, the interior walls of the casing are provided'opposite the several screens with deflecting aprons or guides i 1'. 1' which slope inward, and by breaking the fall of the. material prevent the breaking of the same and thewearing of the. casing.

In some cases it may be desirable to give the screens an oscillating motion, or a rotary motion alternately inopposite directions, instead of a rotary motion continuously in one direction, and in Fig. 4 I have represented This rim a is no part of the funnel, but is a part of the mechanism for this purpose. Each screen has fixed to it a yoke, 12, and q q (f designate horizontal shafts, which have fixed upon them cc centrics or cams at, which work in these yokes. The shafts are mounted in fixed bearings, and when rotated the eccentrics will act upon said yokes and produce the oscillation of the screens. I have in Fig. 4 represented the shaft q as placed at right angles to the shafts q so as to show both a face view and a side view of the yokes t. The shafts q q"qmay each be provided with pulleys, like the pulleys q shown on the upper shaft, q, so that they may be rotated by belts. I11 this modification of my invention each screen may have a short shaft or journal supported in a bearing, 7:, in the hopper below it. If desired, I may employ a central vertical shaft or post, K, as shown in Fig. 5. This shaft or post would be fixed, and the screens would fit the shaftloosely and would rest upon fixed collars p.

The machine shown in Fig. 5 is supposed to have four screens, the lower one being hid within the casing, and I may impart anoscillating motion to them by means of horizontal shafts q q 1 (1, provided with eccentrics or cams working within the yokes, like the cams a and yokes o shown in Fig. i. In this case the upper shaft, q, is represented as provided with driving-pulleys g, but the shafts q g q are rotated,through bevel-wheels s 1*,3" 1 ,5 1-, by a vertical outside shaft, T. As here shown, the several pairs of wheels are of different relative sizes, and hence the screens will be oscillated at different speeds, some faster and some slower.

Any other mechanism than that shown may be used for rotating or oscillating the screens.

In the operation of my machine the coalor other material or substance is delivered from the hopper B to and near the center of the upper screen, f, and by the rotary or oscillating motion thereof is carried outward over the screen. the screen are thrown off or fall at the periphery thereof, and are delivered by the upper chute, h, into suitable bins or receptacles. The smaller pieces pass through the screen and fall into the stationary funnel y, by which they are centralized or delivered onto the second screen, f, at or near its center. They then pass or are caused to pass outward over the said screen f, and smaller pieces fall through the screen and into the second stationary funnel, by which. they are delivered near the center of the third screen, f while the larger pieces are thrown off from the periphery of the screen f into the chute h, and are thereby delivered. In passing over the lower screen, f, the coarser pieces are thrown off at the periphery into the chute 7L2, while the fine pieces and dust pass through the screen All pieces too large to pass throughand into the lower stationary funnel, 9 by which they are delivered into the bottom of the casing A, and thence into the pipe or chute I.

lVhere my machine is used for screening and sizing coal there is but little loss by the attrition of the coal due to pounding, chipping, and crushing of the coal, owing to the short distance the coal has to travel. Hence the machine produces but little dust, and is economical in its operation, much good coal of each size being saved, which would be broken up by the ordinary screening-machine. I am aware that grain and other screening machines have been devised in which are em ployed a number of rotary screens, with fun nels below each for concentrating the material passing through it and delivering it near the center of the screen next below, and hence I do not claim such a construction or combination, broadly. In such machines, as heretofore constructed, the funnels havebeen rotated with the screens, and the delivery of the material downward through the funnels by gravity has been materially impeded or interfered with by the centrifugal action produced by reason of thefunnels rotating with the screens. This I prevent by making the funnels stationary and rotating the screens only, and hence the passage of material through the funnels is much expedited and a greater quantity of material may be screened in a given time.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. The combination of two rotary screens arranged one above the other, an interposed concentrically arranged stationary conical. hopper, and an outwardly and downwardly inclined stationary floor or chute arranged outside of the said hopper and between said screens for the reception of the material thrown or passing over the edge of the upper screen, substantially as and for the purpose herein described. J

2. The combination of two rotary screens arranged one above the other, an interposed concentrically arranged hopper, an outwardly and downwardly linstati onary conical clined stationary floor or chute arranged out side of the said hopper and between said' JOHN SUKITTON.

\Vitnesses:

En. L. hIORAN, FRED. I{AYNES. 

